package com.gv.base.springSecurity.web.interceptor;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import org.springframework.security.access.SecurityMetadataSource;
import org.springframework.security.access.intercept.AbstractSecurityInterceptor;
import org.springframework.security.access.intercept.InterceptorStatusToken;
import org.springframework.security.web.FilterInvocation;
import org.springframework.security.web.access.intercept.FilterInvocationSecurityMetadataSource;
/**
 * 
 * 项目名称：base_demo   
 * 类名称：SysFilterSecurityInterceptor   
 * 类描述：   
 * 创建人：  touch&xcb
 * 创建时间：2012-3-1 下午03:04:23   
 * 修改人：touch&xcb   
 * 修改时间：2012-3-1 下午03:04:23   
 * 修改备注：   
 * @version
 */
public class BaseFilterSecurityInterceptor extends AbstractSecurityInterceptor implements Filter {

	private FilterInvocationSecurityMetadataSource securityMetadataSource;
	 
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		FilterInvocation fi = new FilterInvocation(request, response, chain);
		invoke(fi);
	}

	public FilterInvocationSecurityMetadataSource getSecurityMetadataSource() {
		return this.securityMetadataSource;
	}

	public Class<? extends Object> getSecureObjectClass() {
		return FilterInvocation.class;
	}

	public void invoke(FilterInvocation fi) throws IOException,ServletException {
		InterceptorStatusToken token = super.beforeInvocation(fi);
		try {
			fi.getChain().doFilter(fi.getRequest(), fi.getResponse());
		} finally {
			super.afterInvocation(token, null);
		}
	}
	
	@Override
	public SecurityMetadataSource obtainSecurityMetadataSource() {
		return this.securityMetadataSource;
	}

	public void setSecurityMetadataSource(FilterInvocationSecurityMetadataSource securityMetadataSource) {
		this.securityMetadataSource = securityMetadataSource;
	}

	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	public void init(FilterConfig filterconfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

	 
}
